Apparatus for making blanks by electricity



(No Model.) 2 Sheets-Sheet 1. G. D. BURTON 8; E. E. ANGELL. APPARATUSFOR MAKING BLANKS BY ELECTRICITY. No. 496,591.

Patented May 2, 1893,

WIZJVESSES NE NORRIS FEYERS CO PHBTOLITHU WASHINGTON, D. C

(No Model.)

2 Sheets-Sheet 2.

G. D. BURTON & E. E. ANGELL. APPARATUS FOR MAKING BLANKS BY ELECTRICITY.

No. 496,591. Patented May 2, 1893.

WIZ/VE'SSlS [NI EN] 079 37.

y l dttorney UNITED STATES.

PATENT OFFICE.

GEORGE D. BURTON, OF BOSTON, AND EDIVIN E. ANGELL, OF SOMERVILLE,MASSACHUSETTS, ASSIGNORS TO THE ELECTRICAL FORGING COMPANY,

OF MAINE.

APPARATUS FOR MAKING BLANKS BY ELECTRICITY.

SPECIFICATION forming part of Letters Patent No. 496,591, dated May 2,1893.

Application filed February 20, 1891.

To aZZ whom it may concern.-

Be it known that we, GEORGE D. BURTON, residing at Boston, in the countyof Suffolk, and EDWIN E. ANGELL, residing at Somerville, in the countyofMiddlesex, State of Massachusetts, citizens of the United States, haveinvented certain new and useful Improvements in Apparatus for MakingKnife and other Blanks by Electricity, of which the fol- Io lowing is aspecification.

This invention relates to the making of blanks for knife blades, commonknives, forks, spoons, scratch-awls, chisels, screw-drivers, and similararticles.

The object of the invention is to provide a simple apparatus forproducing blanks of superior quality for the purposes mentioned by theaid of electricity.

In the accompanying drawings, Figure 1 represents a side elevation ofthis improved apparatus. Fig. 2 represents a front elevation partly insection of aportion of the electric heater constituting a part of thisapparatus. Fig. 3 represents a section through the feed roll and itssupport. Fig. at represents a section of the metallic strip from which aknife blank has been punched. Fig. 5 represents a knife blank punchedfrom said strip.

Similarnumerals of reference indicate corresponding parts in thedifferent figures.

This apparatus comprises an electric heater l0 and an ordinary stampingpress 50 disposed adjacent to each other. The support of the electricheater'may be in the form of a curved standard 11 attached at its lowerend to the floor and provided at its upper end with an upright extension12. A lateral arm 13 projects from said standard at its upper end, twosimilar arms 14 and 15 project therefrom at a point below the upper end,and two similar lateral arms 16 and 17 project from the top of theextension 12. These arms are provided With'screw-threaded sockets inwhich headed screw-rods 18, 19, 20, 21 and 22 are secured. An insulatingfeed roll 25 having flanges 26 is journaled on the rod 18 and electrodes30, 31, 32 and 33 are journaled in pairs on the other rods and insulatedtherefrom by Serial No. 382,236. (No model.)

bushings 35 of insulating material. The upper electrodes are extended atan angle above their pivots to cause them to press downward and thelower electrodes are weighted by their lower ends to cause them to pressupward. The adjacent ends of these electrodes are pro- 5 5 vided withanti-friction contact rolls 36 composed of platinum or other suitablematerial, and their outer ends are provided with bind ing posts 37. y

An electric cable 4C0 which may be connected to the positive pole of adynamo is provided with branches 41 and 42 one of which is connectedwith the upper electrode 30 and the other with the lower electrode 33;and an electric cable 15 which may be connected to the negative pole hasa branch 46 connected to the electrode 31 and a branch 47 connected withthe electrode 32.

The stamping press 50 may be of any suitable construction and providedwith dies 51 7c and 52 adapted to out a blank of the desired shape for ametal strip.

In performing the method with this improved apparatus, a strip 100 ofsteel or other suitable metal, is fed byhand or mechanically onto thefeed roll 25 thence between the rolls of the electrodes whichautomatically adjust themselves into contact with the strip and causeelectric currents to pass transversely through the same. By changing theconnec- 8o tions of the cable branches a current may be passedlongitudinally of the strip through the section thereof disposed betweenthe pairs of electrodes. The strip being thus heated to a propertemperature is fed so as to bring a new section between the electrodesand project the heated portion between the punching dies. These dies arethen operated and punch out from the strip a blank of the proper shape.

A rheost-at may be used as apart of the ap- 9o paratus in order todetermine and control the degree of heat necessary where blanks ofdifferent width and thickness are to be heated and stamped. The stripmay be fed to the heater in separate pieces if desired come sponding tothe blank-sections.

I claim as my invention- The combination of a standard, two upperlateral arms extending therefrom, two lower trical conductors connectedwith said arms I lateral arms extending therefrom, a lateral and withthe source of electricity.

arm on an intermediate plane, two pivoted GEO. D. BURTON.

electrodes depending from the upper arms, EDWVIN E. ANGELL. 5 twoWeighted electrodes pivoted to the lower Witnesses:

arms, and extending upward therefrom, a CHESTER MARR,

feed roll on the intermediate arm, and elecl R. W. GALLUPE.

